Their mansion was two hundred and twenty-six feet long and was divided into apartments thirty feet square.
The most important point in this region of the Columbia was named Wappatoo Island by the explorers.

This is a large extent of country lying between the Willamette and an arm of the Columbia which they called Wappatoo Inlet, but which is now known as Willamette Slough.
It is twenty miles long and from five to ten miles wide.

Here is an interesting description of the manner of gathering the roots of the wappatoo, of which we have heard so much in this region of country:-- "The chief wealth of this island consists of the numerous ponds in the interior, abounding with the common arrowhead (sagittaria sagittifolia) to the root of which is attached a bulb growing beneath it in the mud.
This bulb, to which the Indians give the name of wappatoo,( 1) is the great article of food, and almost the staple article of commerce on the Columbia.

It is never out of season; so that at all times of the year the valley is frequented by the neighboring Indians who come to gather it.

It is collected chiefly by the women, who employ for the purpose canoes from ten to fourteen feet in length, about two feet wide and nine inches deep, and tapering from the middle, where they are about twenty inches wide.